Signoes to



oct.- 16, 1923.

c. L. GARGAN ET AL sTbvEPIPE. DAMPER Filed Sept. 17 1921v .Patented oci.ie, 1923i PATENT lorrice.

CHARLES L. GRGAN AND JOSEPH EUSTOE LEINEN, 0F ROCHESTER, NEW YQRK, yAS-SIGNORS TO CHARLES D. LEONARD, OF ROCHESTER, NEW YORK. i

srovnrrrn nar/iran. n

Application filed September 17, 1921. Serial No. 501,388.

To all wiz/imz' may concern:

Be it known ythat we, CHAnLnsL. GARGAN and JOSEPH EUsrAon LEINEN, bothof Rochester, in the county of Monroe and State of New York, haveinvented certain new and useful Improvements `in Stovepipe Dampers; andwe do hereby declare the following to be a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawing, forming a part of this specification, and to the referencenumerals marked thereon.

This invention has to do with dampers for regulating the combustion offuel in stoves, ranges, furnaces and the like, relating moreparticularly to damper appliances for lines' or draft pipes forcontrolling the draft therein. The chief object of the invention is toprovide practical and effective apparatus U of the above character forso controlling the amount of draft as to promote efliciency and economyin the combustion of the fuel, for

preventing the discharge yof gases into the room in which the fire( islocated, and for Ii preventing back drafts into the .lire pot. A furtherobject is toprovide apparatus of the above character which `may, bereadily applied to any draftl pipe and conveniently operated for thepurposes stated. To these and I other ends the invention consists incertain improvements and combinationsof parts,

all as will be hereinafter more fully described, the novel featuresbeingpointed out in the claims at the end of the specification;

In the drawing:

Figure 1 is a plan view of apparatus em bodving lthe present inventionshowing its app ication to an ordinary draft pipe;

Figures 2 and 3 are sectional views of the same taken longitudinallyofthe pipe and showing the operating parts in different po`- sitions; c

Figure 1 is a sectional view on the `line 4-4a of Figure 3; and

Figure 5 is a detailed sectional view on the line tik-5a of Figure 3.

Similar reference numerals throughout the several views indicate thesameparts.

The embodiment of the invention disclosed ferred practical applicationof the same is shown as applied to an ordinary draft pipe 10 in which iscut ailateral opening or vent in the present instance by kway ofillustra-` tion. of the principles involved and a pre-1' 11. Theregulating apparatus is preferably supported as a unit on a sheet metalplate 12 curved to fit the pipe exterior and having at its oppositeedges lperforations 13y in which are engaged the ends of straps 14kembracing the pipe for detachably securing plate 12 thereto. Plate 12is formed with an opening of substantially the size of the lateralopening in the draft `pipe surrounded by aflange adapted to project intothe pipe throughits lateral opening. rThis flange is preferably formedby striking up themai terial of plate 12 on opposite sides of theopening as at 15a, and connecting flange plates 15a at the remainingsides of the opening with similar flange plates 15b, these flange sidespreferably terminating in a common plane parallel with the axis of thepipe.

Means are preferably provided for piv-` otally supporting a damper atone sideof the flanged lateral opening in the pipek described above sothat it may be swung either `againstjthe flange of the opening toclosethe latter, in which case the draft in the pipe is unobstructed, or elselaterally of the pipe to obstruct the draft with the lateral opening orvent uncovered. Such means comprises, preferably, an angular length `ofrelatively stiff wire 16,Figures 2 and 4, located within the llaugedopening and projecting at its ends 17 through perforations in the sideflanges 15a adjacent one of the sides 15b. Pivotally supported on theends of the wire 16 are spaced upstanding ears 18 carried by a maindamper plate 19 preferably of less width in a direction perpendiculartoits pivotal axis than the diameter of the pipe, Figure el. but ofsufficient area to coverand Close the lateral opening of the pipe whenmoved against the flange as indicated in Figure 2. -ftis apparentfromthis construction that damper plate 19 may be swung on its pivot fromthe position shown in Figure 2 in' which it closes thelateral opening ofthe pipe, tothe position shown in Figures 3 and 4 in which the lateralpipe opening is uncovered and the damper extends transversely of thepipe in position to obstruct the draft through the same. c i c The meansfor swinging the damper from one position to another comprisespreferably a threaded post or stud 20, F icure 2, passed through anopening in damper plate 19 and adjustably clamped to the same by meansof nuts21, the upper end of the post havg'ree of obstruction of thelateral opening when the damper is moved'to obstruct the The apparatusthus provides a simple, practical and effective` construction for theregulation of the degree of draft which is selected with reference tothe condition `of the fire. The movement of the damper away from thevent or lateral opening of the pipe serves to admit air through thelatta-,r as de` termined by the adjustment of closure 44 to reduce thedraft acting on the fire pot, and the damper plates may be relativelyadjusted toward and from each other in con-` tain a sufficient draft forthe complete combustion of the fuel and the apparatus affords a degreeof control largely obviating the necessity for adjustment of the otherdraft means or doors usually provided in a stove or furnace. The partsare so constructed and arranged that when suitably adjusted aconsiderable degree of draft may be permitted up the pipe while at thesame time any back draft down the pipe is arrested by the circuitouspath formed by the damper and by the upward flow of gases past thesaine, and is deflected outwardly through the lateral opening in thepipe preventing the entrance of the same into the ire box. Ilheconstruction is economical to manufacture, and may be readily applied toany ordinary draft pipe.

We claim as our invention: j

1, ln a device of the class described, the combination with a draft pipehaving a lateral opening therein of a. damper supported in the pipeadjacent said lateral opening for movement to selectively obstruct saidopening or said. pipe and comprising a plurality of plates each adaptedto partially close said pipe, and means for adjusting the position ofone of said plates on the damper to vary the degree of obstruction ofthe draft when said damper is moved to draft j obstructing position. j

At the same time the` line or pipe may be so regulated as to main- 2. Ina device of the class described, the combination with a draft pipehaving a lateral opening therein of a damper movably supported in thepipe adjacent saidlateral opening for closing said lateral opening inone position and for obstructing said pipe in another position, and anadjustable cloj surefor variably obstructing said lateral opening whensaid damper is in said pipe obstructingy position.

3. In a device of the `class described, the combination with a draftpipe having a lateral opening therein of a damper m'ovably supportedinthe pipe adjacent said lateral opening for closing said lateral openingin one position and for obstructing said pipe in another position, saiddamper comprising a plurality of plates each adapted to partially closesaid pipe and one of which is adjustable on the damper to vary thedegree of obstruction of said pipe, and an adjustable closure forvariably obstructing said lateral opening when said damper is in saidpipe obstructing position.

4. In a device of the class described7 the combination with a draft pipehaving a lat-- eral opening therein of a damper plate y movablysupported in said pipe adjacent said lateral opening and adapted in oneposition to close said opening and in another position to extendpartially across the pipe interior, a second plate arranged in paralleloverlapping relation with the rst to extend across the remainder of thepipe interior, and meanssupporting said second plate for movement towardand from the first to provide a variable draft passage therebetween andfor movement parallel with said rst plate transversely of the pipe.

5. Ina device of the class described, the combination with a draft pipehaving a lateral openingtherein of a damper provided with an adjustablepart and movably supported in thepipe adjacent said, lateral opening tocontrol the draft in the pipe and also said opening, a lever pivotallysupported on the'pipe, a link connecting said lever and damper, meansaccessible through said lateral opening for adjusting the connectionbetween said link and damper and for adjusting said part on the damper,and a movable cover for said lateral opening.

